Home / 20,698.20-31,055.40-7,551.90

Finding the Fourth Proportional to 20,698.20, 31,055.40 and 7,551.90

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Solution

The fourth proportional to 20,698.20, 31,055.40 and 7,551.90 is: 11,330.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.20 : 31,055.40 = 7,551.90 : x
  2. Step 2: Convert to fraction form
    20,698.20/31,055.40 = 7,551.90/x
  3. Step 3: Cross multiply
    20,698.20x = 31,055.40 × 7,551.90
  4. Step 4: Simplify right side
    20,698.20x = 234,527,275.26
  5. Step 5: Solve for x
    x = 234,527,275.26/20,698.20
  6. Step 6: Final answer
    x = 11,330.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.